sharp or caustic in style, and in tone. Sarcastic. mean. To be in an asshole mood.
A wife would say this to her husband who comes home in a harsh, bad mood everyday because he hates his job:
"Listen, don't come home being a mordacious prick everyday because you can't handle your job".
From [mondo (bizarro), very bizarre, from ItalianMondo)
Acious-
a suffix forming adjectives that correspond to nouns ending in the suffixes -acity and -acy: audacious; fallacious.ZI
That is one mondacious vehicle. Your girl is very mondacious.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)